Biosorption of Cr(VI) and Ni(II) onto Hydrilla verticillata dried biomass

Mishra, Ashutosh; Tripathi, B. D.; Kumar, Ashwani

doi:10.1016/j.ecoleng.2014.09.057

Cited by 35 publications

(14 citation statements)

References 74 publications

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“…Thus, in order to meet the water quality standards, it is essential to reduce the Ni (II) ion concentration to their permissible limit before discharge the industrial effluent into the environment. Early attempts to remove heavy metals adopt the conventional approaches, which are gradually found to be not economical, produced secondary pollutants and less effective at low metal ion concentrations [4,12]. Therefore, the imposition of stringent regulation rises to insist for new technologies in solving the aforementioned problem.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic exploration of Ni (II) removal by immobilized bacterial biomass and interactive influence of coexisting surfactants

Naskar

Bera

2017

Env Prog and Sustain Energy

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Herein, the adsorption efficiency of biomass based on mutated bacterial strain (Bacillus cereus M 1 16 ) impregnated into calcium alginate towards Ni (II) ions was investigated in batch system. Biomass was characterized by sophisticated instrumental analyses. The influencing process parameters on Ni (II) removal from monometallic system were studied and optimal conditions were ascertained. The performance of such biosorbent on exposure to different metal ions was also evaluated. Especially, this work focused on principal interest in Ni (II) removal in presence of surfactants (Sodium dodecyl sulfate and Triton X-100), where Sodium dodecyl sulfate offered synergetic effect as a function of sorption yield. The best fitted pseudo-second order and film diffusion kinetic model in presence of surfactants provided more suitable prediction reflecting rate controlling steps of Ni (II) removal process. Additionally, experimental data adequately fitted by both Redlich-Peterson and Langmuir-Freundlich dual isotherm model. Thermodynamically the process was found to be spontaneous, endothermic and entropy-driven. Regeneration studies were conducted with a series of five sequential adsorption-desorption cycles. Moreover, biomass proved its worth for effective removal of Ni (II) from simulated inorganic wastewater. Thus, this green chemical approach may have immense potential to be explored in the actual system.

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Section: Introductionmentioning

confidence: 99%

Mechanistic exploration of Ni (II) removal by immobilized bacterial biomass and interactive influence of coexisting surfactants

Naskar

Bera

2017

Env Prog and Sustain Energy

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“…To study variations on elementary level of NSP, EDX analysis was conducted before and after removal of halosulfuron methyl 38 . It can be demonstrated from the Fig.…”

Section: Resultsmentioning

confidence: 99%

Mechanisms of halosulfuron methyl pesticide biosorption onto neem seeds powder

Saeed

Usman

Zahoor

et al. 2021

Sci Rep

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The current investigation was designed to remove halosulfuron methyl from aqueous media by means of neem seed powder (NSP) in batch modes. Characterizations of NSP were carried out by using EDX, SEM, FTIR, point of zero charge and surface analysis. Optimum operation conditions were scrutinized by studying the influence of different factors like solution pH, dose of NSP, contact time, initial halosulfuron methyl concentration and temperature. Result indicates the dependency of the removal of halosulfuron methyl on solution pH and maximal removal (54%) was achieved in acidic medium (i.e. pH 3.0). To identify the chemical surface of NSP, point of zero charge of NSP was determined and was found to be 6.5 which imply that the surface of NSP is positively charged below pH 6.6 and favored the anionic sorption. Kinetics of halosulfuron methyl were demonstrated well by pseudo second order due to highest R2 (0.99) owing to the nearness between experimental and calculated sorption capacities. Isotherm results imply that Langmuir was found to the principal model to explain the removal of halosulfuron methyl and maximum monolayer sorption capacity was determined to be 200 mg g−1. Thermodynamic parameters like ΔH°, ΔG° and ΔS° were calculated from van’t Hoff plot and were found negative which suggest that removal of halosulfuron methyl is exothermic and spontaneous at low temperature. These outcomes insinuate that neem seed power may be a valuable, inexpensive and ecofriendly biosorbent for the removal of pesticides.

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“…Aşağıda bu iki izoterm modeli ile ilgili olan eşitlikler yer almaktadır (Eşitlik 9 ve 10): Burada maksimum bağlanma enerjisine karşılık gelen denge bağlanma sabiti, Temkin izoterm sabiti, sıcaklık (K) ve ise ideal gaz sabitidir. [29,52]. Aynı zamanda, konsantrasyon değişikliğine bağlı olarak giderim veriminde meydana gelen değişim konusunda şu yorumlama yapılabilir; yüksek başlangıç Ni(II) konsantrasyonlarında biyokütle üzerinde serbest bir şekilde mevcut olan adsorpsiyon bölgeleri nikel iyonlarıyla doygun hale gelmiş olup, çözeltideki aşırı nikel iyonları için serbest mevcut bölgeler böylelikle tükenmiştir.…”

Section: Biyosorpsiyon Dengesiunclassified

Kapya Bi̇ber Artiği Kullanilarak Bi̇yosorpsi̇yonla Atiksulardan Ni̇kel Gi̇deri̇mi̇

Gürel¹,

Meşe²,

Şeker³

et al. 2020

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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Bu çalışmada, toksik bir ağır metal olarak bilinen Ni(II) iyonunun, yeni bir biyosorbent materyali olan kapya biber çekirdeği kullanılarak sucul ortamdan giderimi araştırılmıştır. Optimum Ni(II) giderim koşullarının belirlenmesi amacıyla başlangıç pH değerinin, biyosorbent miktarının, başlangıç Ni(II) konsantrasyonunun ve zamanın değişimi incelenmiştir. Bu kapsamda yapılan çalışmalara ek olarak, izoterm çalışmaları Langmuir, Freundlich ve Temkin modelleri kullanılarak, kinetik çalışmaları ise yalancı birinci, ikinci derece ve Elovich reaksiyon modelleri kullanılarak gerçekleştirilmiştir. Ayrıca iç partiküler difüzyonu incelemek için Weber-Morris ve Dumwald-Wagner modelleri de kullanılmıştır. 125-250 μm boyut aralığındaki biyokütleler ile 25°C sıcaklıkta gerçekleştirilen çalışmalar neticesinde maksimum giderim verimi (%42) 28 g/L biyosorbent dozajında elde edilmiştir. Deneysel çalışmalar süresince elde edilen en uygun pH değeri olan 5,5'te, maksimum biyosorpsiyon tutma kapasitesinin 4,2 mg/g olduğu tespit edilmiştir. Denge verilerinin Langmuir izoterm modeline uygun olduğu (R 2 =0,98) bulunmuş olup, yalancı ikinci derece reaksiyon modelinin ise kinetik açıdan en uygun model olduğu (R 2 =0,98) ortaya konmuştur. Weber-Morris modelinin sonuçları doğrultusunda iç partiküler difüzyonun hız sınırlayıcı etkiye sahip olmadığı tespit edilmiştir.

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Biosorption of Cr(VI) and Ni(II) onto Hydrilla verticillata dried biomass

Cited by 35 publications

References 74 publications

Mechanistic exploration of Ni (II) removal by immobilized bacterial biomass and interactive influence of coexisting surfactants

Mechanistic exploration of Ni (II) removal by immobilized bacterial biomass and interactive influence of coexisting surfactants

Mechanisms of halosulfuron methyl pesticide biosorption onto neem seeds powder

Kapya Bi̇ber Artiği Kullanilarak Bi̇yosorpsi̇yonla Atiksulardan Ni̇kel Gi̇deri̇mi̇

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